Radical open innovation requires systems thinking and problem solving methods. It involves collaboration across diverse partners to solve complex problems accelerated by technological, economic, and environmental changes. Systems thinking views problems holistically rather than through generalizations and can help address unintended consequences and design effective policies for managing systems. Key tools for systems thinking include causal loop diagrams, stock and flow models, and identifying archetypes to predict system behaviors and assess how proposed changes may impact the system over time. Simulation is also essential to validate if changes will lead to sustainable outcomes.